Ariba Inc. (Nasdaq:ARBA), DryShips Inc. (Nasdaq:DRYS) and ViroPharma Inc. (Nasdaq:VPHM) are among the most actively traded companies in Monday's trading among companies with market capitalizations under $1 billion.

Also included among the results: Canadian Solar Inc. (Nasdaq:CSIQ), A Power Energy Generation Systems Ltd. (Nasdaq:APWR), Eagle Bulk Shipping Inc. (Nasdaq:EGLE), Savient Pharmaceuticals Inc. (Nasdaq:SVNT), Infinera Corp. (Nasdaq:INFN) and James River Coal Co. (Nasdaq:JRCC).

Here are the most actively traded companies among small caps:

For access to the full article, you must be a registered member - it's FREE.